Disk usage: estimate and summarize file and directory space usage. More information: <https://www.gnu.org/software/coreutils/du>.

• List the sizes of a directory and any subdirectories, in the given unit (B/KiB/MiB):
  du -b|k|m path/to/directory
• List the sizes of a directory and any subdirectories, in human-readable form (i.e. auto-selecting the appropriate unit for each size):
  du -h path/to/directory
• Show the size of a single directory, in human-readable units:
  du -sh path/to/directory
• List the human-readable sizes of a directory and of all the files and directories within it:
  du -ah path/to/directory
• List the human-readable sizes of a directory and any subdirectories, up to N levels deep:
  du -h --max-depth=N path/to/directory
• List the human-readable size of all `.jpg` files in subdirectories of the current directory, and show a cumulative total at the end:
  du -ch */*.jpg

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